Flap detection vol2 (#915)

* We now purge flapping routes before regular tick processes them

* Updated comments

* Record the timestamp as soon as you receive the event

* Set route Address to routing table test

* Fixed a bunch of deadlocks. Added basic Router tests.

router/table_test.go

@@ -7,6 +7,7 @@ func testSetup() (*table, Route) {
 
 	route := Route{
 		Service: "dest.svc",
+		Address: "dest.addr",
 		Gateway: "dest.gw",
 		Network: "dest.network",
 		Router:  "src.router",